playcanvas/build/playcanvas/src/scene/shader-lib/glsl/chunks/gsplat/vert/formats/sogSH.d.ts

Open-source WebGL/WebGPU 3D engine for the web

declare const _default: "\n#if SH_BANDS > 0\n    #ifndef SOG_V2\n        uniform float shN_mins;\n        uniform float shN_maxs;\n    #endif\n\n    void readSHData(out vec3 sh[SH_COEFFS], out float scale) {\n        // extract the 16-bit centroid palette index from sh_labels bytes 0 and 1\n        vec4 labels = texelFetch(sh_labels, splat.uv, 0);\n        int n = int(labels.x * 255.0 + 0.5) + int(labels.y * 255.0 + 0.5) * 256;\n\n        // calculate offset into the centroids texture (64 centroids per row, SH_COEFFS texels each)\n        int u = (n % 64) * SH_COEFFS;\n        int v = n / 64;\n\n        // read consecutive texels for this centroid\n        for (int i = 0; i < SH_COEFFS; i++) {\n            vec4 t = texelFetch(sh_centroids, ivec2(u + i, v), 0);\n            #ifdef SOG_V2\n                ivec3 idx = ivec3(t.xyz * 255.0 + 0.5);\n                sh[i] = vec3(lutShN(idx.x), lutShN(idx.y), lutShN(idx.z));\n            #else\n                sh[i] = mix(vec3(shN_mins), vec3(shN_maxs), t.xyz);\n            #endif\n        }\n\n        scale = 1.0;\n    }\n#endif\n";
export default _default;